Tire guard



Patented June 1s, 1940 2,205,266

UNITED. STATES PATENT oFricE TIRE GUARD.

Frank A. Hart, New York, N. Y.

Application January 5, Ii939, Serial No. 249,386 2 claims. (ci. 152-357) My invention contemplates the adaption of my be previously shaped but made of flexible steel guard to the manufacture of shoes and may be or other suitable metal or alloy. built in at the factory. It is also adaptable to In fitting the guard into a tire the end of the shoes now in use and may be easily and simply Strip I5 is cut longer than the portion I6 to 5 inserted in the standard shoe. ferm a flap 2l. As shown in Fig. 2, this flap 2l 5 In the past there have been a number of linwill cover the junction 275 so that there will be ings of different types which have been used in no chance of the member 20 coming in contact shoes between the tubeand the shoe to protect With the tube. The ends 23 and 24 of the memthe tube. These linings, however, do not adeber 20 may be made to meet or overlap within quately protect the inner tube from materials the envelope I4, and in operation may be cut so 10.l working through the shoe. Moreover, they are as to allow them to butt-end or slightly overlap. hard to keep inplace when the tube is deflated It will be. seen that the envelope I4 may be and rely solely upon the pressure of the tube to prepared separately and the steel or metal inner hold them in position. My improved guard will member 20 may likewise be prepared separately. maintain its position regardless of whether or The inner member 2!! may then be fed into the 15 not the tube is inflated, and will not slide, slip envelope I4 and so telescoped as to place the ends nor overlap. 23 and 24 away from the joint 22.

Referring more particularly to the drawing- It will be further noted that the flaps I8 and Fig. l is a cross-sectional view through a tire I9 on the envelope III extend out laterally, and showing the guard in place; when the tube I2 is placed in the shoe Ili the 20 Fig. 2 is a perspective view showing the guar flaps I8 and I9 extend upwardly between the out of the tire; walls of the tube and shoe. They thus serve not 3 is a cross-sectional View taken on the only aS a gripping medium to hold the guard line 3 3 'of Fig 1; I3 in place but, in addition, act as a protective 25 Fig, 4 is a plan View Showing the envelope means to save the tube against cracks or other 25 which forms part of my guard; penetrations at the side thereof. The flaps I 8 Fig. 5 is a cross-sectional view taken on the and. I9 also protect against the pinching of the line 5 5 of Fig. 4; and tube.

Fig. 6 is a sectional view taken on the line 6 5 While I have shown and described my invenof Fig. 4. tion as applied to a unit which may be placed in 30 As shown in Fig. l, my guard is adapted to a standard shoe, it will be appreciated that the operate with a standard shoe I II which is held in unit may be built directly in the shoe in the place by a rim II and has enclosed the usual Course of manufacture, and the eiect would be inner tube I2. The guard I3 rests between the very much the same as shown in Fig. l. In buildlower portion of the inner tube and the Shoe ing the gllad directly into the shoe it will not 35 and consists of a fabric envelope I4 having an be necessary to have the envelope It, but a per inner surface I5 and an outer surface I6. The marient covering should be cemented over the two strips I5 and I6 are fastened together near guard member 20. their outermost ends at Il by stitching, cement I claim:

or other suitable means, and flaps I8 and I9 exl. The combination with an inner shoe and a 40 tend laterally beyond the envelope proper in ortube, of a tire guard comprising a flexible enn der to provide a gripping and protecting sur- Velope, a one piece metal guard member in said face between the tube and the shoe at the side. envelope extending throughout the circumfer-A The envelope serves to cover the guard I3 and ence of the shoe, and a flap on said envelope to to protect the tube I2 from any contact therecover the junction between the ends of said en- 45 with. It will be appreciated that a rigid or semivelope. rigid guard member might injure the rubber tube 2. The combination with a shoe and an inner I2. The lateral extensions I8 and I9 of the entube, of a tire guard between rsaid shoe and tube, velope, extending around the sides of the tube said tire guard comprising an envelope, a single I2 and between the tube I2 and the shoe IU, postrip of flexible steel in said envelope, and iiaps 50 sition not only the envelope I4 but the guard I3 extending laterally from said envelope-throughcontained therein to prevent slipping in any diout its length adapted to be positioned between rection especially when the tire is soft. A ilexi- Said shoe and tube at the side thereof to hold ble metal member 20 is inserted in the envelope. said guard in place.

The member 2U may be a flat piece of steel so FRANK A. HART. 55 flexible as to readily assume a U shape, or it may 

